Perhaps you should try some spelling variations:
sach van » sach han, sach va, bach van
truc van » thuc van, truc ban, truc dan
su sach » so sach, vu sach
hanh de » hanh ve, hanh kem
truc va » thuc va, thuc vat, trung va
hieu ve » hieu va, hieu van
nang xa » lang xa, nang ma, mang xa
cua tre » cua te, cuu tre, cua triet
ve cau » ke cau, va cau, ve cac
de cua » le cua, te cua, dieu cua

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach van ((nang xa) OR (nang x)) hoi. hieu ve cau ((truc van) OR (truc va)) hanh de cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach van ((nang xa) or (nang x)) hoi. hieu ve cau ((truc van) OR (truc va)) hanh de cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sach van ((nang xa) or (nang x)) hoi. hieu ve cau ((truc van) OR (truc va)) hanh de cua tre*.